Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
van chat » cao chat
chat cua » nhat cua, chat va, chat huu
dan hanh » dan khanh, dan thanh, ban hanh
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
sai ky » sac ky
ve cua » le cua, de cua, te cua
tu sai » tu bai, tu san, tu cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((nang xa) or (dang xay)) hoi. hieu van chat cua ((dan hanh) OR (dang hanh)) ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang xa) OR (dang xay)) hoi. hieu van chat cua ((dan hanh) OR (dang hanh)) ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang xa) or (dang xay)) hoi. hieu van chat cua ((dan hanh) OR (dang hanh)) ve cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang xa) or (dang xay)) hoi. hieu van chat cua ((dan hanh) OR (dang hanh)) ve cua tre*.